So long as the battery is on the inside piece, it really isn't much different from a manual deadbolt. There's some extra gears and the motor, but they're going to be behind plates of metal- if you are taking a crowbar or hammer to one, you'll make enough noise that you might as well just break a window.

On the other hand, a super distinctive deadbolt on your front door that is known to be easy to open with a bobby pin is basically anti-security as you are advertising that your home can be entered without leaving a trace.